Meaning of ANTAGONIST in English

ANTAGONIST

n.1 an opponent or adversary.

2 Biol. a substance or organ that partially or completely opposes the action of another.

Derivatives:

antagonistic adj. antagonistically adv.

Etymology: F antagoniste or LL antagonista f. Gk antagonistes (as ANTAGONIZE)

Oxford English vocab.      Оксфордский английский словарь.